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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
If u go 5 times North, you should go 5 times South. I hope ununderstand my hint.)
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array || []evaluates toarraywhenarrayis a truthy value and otherwise evaluates to an empty array.So,
array = array || []will setarrayequal to an empty array if it does not already refer to an object.